Gubanov, V. O., and L. N. Ovander. “Development of the Bethe Method for the Construction of Two-Valued Space Group Representations and Two-Valued Projective Representations of Point Groups”. Ukrainian Journal of Physics 60, no. 9 (January 15, 2019): 950. Accessed November 22, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019186.